The WP Recipe Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Skill Level' input field in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping on user-supplied attributes. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
https://plugins.trac.wordpress.org/browser/wp-recipe-manager/trunk/inc/libs/class.metaboxes.php#L203